Can I get help with USB Mass Storage on SAMD51 Thing Plus?

I would like to expose the 4MB flash on the SAMD51 Thing+ board as USB Mass Storage. I am able to do that on Feather M4/nRF52840 with TinyUSB but no such option seems to exist for the SAMD51 Thing+. Is there any reason TinyUSB couldn’t be added as an option to the SparkFun SAMD BSP for SAMD51 (and probably others in the package) the way that it is for Feather M4? I’ve tried it a bit, but I’m not too familiar with that side of Arduino code and couldn’t get it to compile.